Dust-conveyer for threshing-machines.



No. 629,873. Patented Aug. l, I899. G. W. RUSSELL. DUST CUNVEYER FORTHRESl-HNG MACHINES.

(Application flied. Aug. 26, 1898.)

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UNITED STATES PATENT OFFICE.

GEORGE W. RUSSELL, OF GREENE, IOWA.

DUST-CONVEYER FOR THRESHlNG-MACHINES.

SPECIFICATION forming part of Letters .Patent No. 629,873, dated August1, 1899. Application filed August 26, 1898. Serial No. 689,589. (Nomodel.)

To all whom zit ntay con-corn.-

Be it known that l, GEORGE W. RUSSELL, a citizen of the UnitedStates,,residing at. Greene, in the county of Butler and State of Iowa,have invented new and useful 1m provements in Dust-Conveyers forThreshing-Machines, of which the following is a specification.

My invention contemplates the provision of an improved conveyor forseparating dust from straw incident to the passage of the straw througha threshing-machine and conducting such dust to a point suliicienilyremote from the machine to prevent it from annoying the machineattendants.

The novelty and advantages of the invention will be fully understoodfrom the following description and claims when taken in conjunction withthe annexed drawings, in which- Figure 1 is a sectional view ofinyiniprovements in their operative position on a threshing-machinecasing. Fig. 2 is a plan view of the screen for excludingstraw andchaff'from the conveyer. Fig. 3 is a transverse section of the saidscreen.

In the said drawings similar letters designate corresponding parts inall of the several views, referring to wliich- A is a portion of athreshing-machine casing, and B is the fan-chamber of my improvedconveyer, which is arranged outside the casing A and preferably at apoint above the shaking-screens (not shown) of the machine, although itmay be arranged at any other point suitable to the purposes of theinvention. The said chamber B is provided with two lateralinduction-pipes O, which connect it with the interior of the casing Aand are curved, as shown, so as to eifectually prevent dust from lodgingin and choking them up. It is also provided at its upper end with aneduction-opening D, surrounded by an outwardly-directed flange E. Onthis flange E is arranged and fixed an annulus F,

having an inner raised portion a, and between the said inner raisedportion of the annulus and the flange E of the fan-chamber is interposedthe base-flange Got a dust-conducting pipe H. This pipe H is of such alength as to conduct'the'dust to apoint remote from the machine, and byreason of it being connected with the fan-chamber after the manner ofaswivel, as above described, it is adapted to he swung around upon thesaid chamber and caused to extend from the same in the direction thatthe wind is blow- .1ng I I is the suction or exhaust fan, which isarranged in the chamber B and is fixed upon a shaft'J,extendingtherethrough. Theshaft is designed to be driven from anypreferred shaft of the threshing-machine, and while I have shown it asprovided witha pulley?) to receive a connecting-belt it is obvious thatit may be rotated through the medium of any other interposed gearing.

.K is the screen of my improvements, which has for its purpose toprevent straw and chafi from passing into the conveyor. The said screencomprises a rectangular frame 0 and closely-arranged bars or slats d,the said bars having the inclined upwardly-extending end portions e, soas not to obstruct the passage of straw and being disposed in thedirection in which the straw moves, so as to enable the passing straw tokeep the spaces between them clearfor the passage of air and dust. Ialso prefer to connect one end of the screen K to the topwallof themachine-casing in a hinged manner, as indicated by f, and permit itsother end to hang in the casing, since this mode of connection permitsof the screen being readily moved to afford access to the interior ofthe conveyor when it is necessary to clean or repair'the same.

WVhen desirable or necessary, a spring f may be employed, the samehaving forits purpose to sustain the weight of the screen and preventthe same from retarding the passage of the straw or interfering with theseparation of grain therefrom.

In the practice of the invention the suctionfan I is rotated at a highrate of speed while the threshing-machine is in operation and serves todraw all of the dust from thestraw passing beneath the screen K andforce the same through the pipe H to the point of dis charge.

The screen K serves to edectually prevent the entry of straw and chaffinto the conveyor and yet does not interfere with the passage of air anddust, since the spaces between-its bars or slats are kept clear at alltimes by the passing straw.

I have illustrated and described my improvements as attached to andforming a permanent part of a threshing-machine casing. I do not desire,however, to be limited to this, as, when desired, the improvements maybe attached to a body designed to be placed in an opening of andconnected to the machinecasing or may be connected to said casingin anyother suitable manner. I also do not desire to be understood asconfining myself to using the improvements in conjunction with athreshing-machine casing, as they may be used in other connections tocarry off dust and also for ventilating purposes.

Having thus described my invention, what I claim isl 1. In adust-conveyor for threshing-machines, the combination of athreshing-machine casing, a fan-chamber having an eduction or dischargepipe of suitable length and also having an induction-pipe communicatingwith the interior of the threshing-machine casing, a suction or exhaustfan arranged in said chamber, and a screen for preventing the entry ofstraw and chaff into the inductionpipe; said screen being arranged atthe inner side of a wall of the casing so as to be kept clear by thepassingrstraw and comprising parallel bars or slats extending in thedirection of movement of the straw through the machine and having theupwardly-extending inclined end portions, substantially as and for thepurpose set forth.

2. In a dust-conveyer for threshing-machines, tbe combination of athreshing-machine casing having an opening in one of its walls, afan-chamber having an eduction or discharge pipe and also having aninductionpipe connected with the opening in the casing- Wall, a suctionor exhaust fan arranged in said chamber, a screen, for preventing theentryof straw and ehafi into the induction-pipe, arranged at the insideof the casing-wall and over the opening therein and connected at one endin a hinged manner to said casingwall; said screen comprising parallelbars or slats extending in the direction of movement of the strawthrough the machine and having the upwardly-inclined end portions, and aspring connected to the casing-Wall and bearing against the free end ofthe screen, substantially as specified.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

GEORGE IV. RUSSELL.

WVitnesses:

O. H. WILLIAMs, M HARTNEss.

